INDEX. 53 



Comet, continuation of the catalogue of, xx. 308-31 1 



Commerce of Mecca, viii. 47-50 



Compass. (See Bain and Variations,) antiquity of, vi. 87. Its 



variation when discovered, 88, table thereof, 89. Supposed 



causes of it, 89-105 

 observations on the variation of, in the late Voyage 



of Discovery to the North Pole, ix. 81-lOG. Computations for 



clearing the compass of a' ship's permanent attraction, 372- 



380 

 — — needle, best kind of steel and form for, xii. 132 



Composition, attraction of, i. 90 



Compound substances, results of the fusion of, with the blowpipe, 

 ii. 110-113 



Compounds, insoluble and difficultly soluble, hygrometric pro- 

 perties of, xix. 92 



Compressibility of water, experiments on, x. 399 



Conchology remarks on different systems of, xiv. 67-86 



Concretions intestinal, analysis of, xiv. 237 



Conductor, new, for lightning, ix. 199 



' ■ eifects of lightning upon a bad one, x. 460 



for lightning, report on, xix. 145 



Conductors (fluid), on the motion produced in, when transmitting 

 the electric current, xvii. 256 



CoNFiGLiAccHi (M.), experiments of, on the poison of vipers, x, 

 193 



Congelation, progress of, in Switzerland, vii. 166 



on the limit of constant, in the Himalaya Mountains, 



vii. 38-43 



Conglomerate rocks, formation of, xix. 208-212 



Coniferous plants of Koempfer, observations on, ii. 309-314 



Connaissance dcs Terns for 1812, note respecting it, xi. 176. Vin- 

 dication of that work, 373 



Consolidation of rocks, xix. 32-38. Different rocks and their 



modes of consolidation, 38-43. General causes of it, 43 

 Constantinople, account of the Souterazi of, vi. 350 

 Constituents of rocks, xix, 28-32 



